I don't see it really as a change of heart...they've alwaysbeen very ruthless in their way. Remember, it was the Vorlons whosimply decided to off Deathwalker in first season.

There's some amount of escalation going on, obviously, whichwill be explained a bit more in upcoming episodes, but they've alwaysbeen this way, it's your perception of them that's at odds. You fellfor what they wanted you to see them to be.